Yritma 20PCS Tungsten Carbide Burr Set, Shank Dia.: 1/8""(3mm), Made in China. ❤Packaging: 1 Plastic Case. ❤10 x Head Dia.: 3mm Solid Carbide, Overall L 38mm, 9 Flutes. ❤10 x Head Dia.: 6mm Brazed Joint, Shank Material 40Cr, Overall L 43 to 50mm, 14 Flutes. ❤Head Hardness: HRA90, Cut Type: Double Cut, Coating: Bright (Uncoated). ✪Features & Benefits: ☛-Double Cut; ☛-First choice for general machining; ☛-Improves ease of control; ☛-Increases metal removal rate; ☛-Breaks swarf into small manageable pieces; ☛-First choice for non-ferrous materials and plastics; ☛-High helix and large flute volume for rapid metal removal. ❤Max Rotation Speed: 120000 RPM (Head Dia. 3mm), 60000 RPM (Head Dia. 6mm), Direction of Rotation: Right Hand/Clockwise, Feed Direction: In general, burrs are used counter-rotationally or with a swinging motion. Pass the tool rapidly over the workpiece in the direction of rotation to achieve fine finishes or to achieve very smooth chamfers. ❤Burr Shape: End Cut Cylindrical, Ball Nosed Cylindrical, Ball, Oval, Ball Nosed Tree, Tree, Flame, Ball Nosed Cone, Cone, Inverted Cone. ❤Optimal Drive Tool: Straight, Angle Die Grinder, Flexible Shaft Drive, Robot. Average Drive Tool: Drill, Drill Press. Drive Type: Air or Electric. ❤Optimal Fix Type: 1/8 inch collect and nut, Average Fix Type: Chuck. ❤Materials Applications: Hard Wood, Balsa, Wax, Soapstone, Slate, Marble, Granite, Concrete, Steel, Hardened Steel, Weld-Seam, Stainless Steel, Brass, Copper, Bronze, Aluminum, Cast Iron, Cobalt, Nickel, Titanium, Zinc, Earthenware, Terracotta, Porcelain, Fiberglass, Plastic, Rubber, Fiber-Reinforced Plastics and so on. ❤Burr Applications: Carving, Engraving, Sculpturing, Polishing.